Kaiser Chiefs kick off Glastonbury Festival

By the Associated Press | June 27, 2014 | 10:04 AM EDT

Three festival goers walk through the mud towards the Pyramid stage at the Glastonbury Music Festival, England, Friday, June 27, 2014. Thousands of music fans have arrived for the festival to see headliners Arcade Fire, Metallica and Kasabian. (Photo by Jonathan Short/Invision/AP)

LONDON (AP) — An unannounced set by Kaiser Chiefs has kicked off Glastonbury, Britain's leading summer music festival.

The British rockers played a surprise morning gig Friday, the first full day of the event. Dolly Parton, Arcade Fire, Blondie and Metallica are among the other headliners playing a festival famed for music — and mud.

More than 150,000 ticketholders have descended on Worthy Farm in southwestern England for the music extravaganza, which ends Sunday. Many sported the Glastonbury fashion staple — rubber Wellington boots — as rain began to turn the 900-acre (364-hectare) site into a mudbath.

Police said a 26-year-old man died on Friday after having a bad reaction to ketamine, and a 67-year-old woman died at the site of natural causes.